There is nothing about Beedrill that let's a player circulate Energy
Legality depends on the tournament format -- Krang & Shredder can be legal in some formats and banned or restricted in others
It plays creatures, backs them up with combat tricks and a little removal, and tries to get its beatdown on
If you're playing Dawn in the deck or plan on putting a retreated Pokemon back on the active spot later on, Shaymin also lets you be more efficient in Energy by saving one
Commander Masters is its first real reprint in years, making it one of the more expensive Slivers on this list
Oko was banned in Standard in November of 2019, over the next two years, he got banned from Pioneer, Modern, and Legacy